GBLT is debiting 2 amounts from my bank account this month. Why?

Did you give GBLT permission for direct debit payment in instalments? Then we will debit the amount on each tax assessment from your account in instalments.

It can occur that GBLT debits two amounts from your bank account

There are 2 reasons why GBLT may debit two amounts from your bank account:

You have received more than one tax assessment. Such as tax assessments for two different tax years.
You are a joint resident. In that case, you sometimes receive two tax assessment addressed to different people. You can pay these in instalments using the same bank account. GBLT will then debit 2 different amounts from your bank account.